Chusetts



(No Model.)

J. 0. DE WOLF. HOSE FITTING.

No. 591,796. Patented Oct. 12,1897.

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UNITED STATES PATENT OFFICE.

JOHN 0. DE XVOLF, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO THE BOSTON WOVEN HOSE AND RUBBER COMPANY, OF BOSTON, MASSA- CHUSETTS.

HOSE-FITTING.

SPECIFIGAIION forming part of Lettrs Patent No, 591,796, datd Octob r 12, 1897. Application filed December 17, 1896. Serial No. 615,950. (No model.) 4

T0 aZZ whom it may concern:

Be it known that I, JOHN 0. DE WOLF, of Cambridge, county of Middlesex, State of Massachusetts, have invented an Improve-- ment in Hose-Fittings, of which the following description, in connectionwith the accom' panying drawings, is a specification, like letters on the drawings representing the parts.

In connecting hose, making a joint therein, or securing a nozzle thereto it is exedingly difficult to make the joint water-tight and steam-tight.

Joints are now commonly formed by clamping the hose over an interior metallic thimble by means of metallic straps passed about the hose and having their ends drawn together usually by set-screwS. These joints pinch the hose between the ends of the straps and do not uniformly clamp the hose at all points, thereby. inviting leaks. The provision of overlapping or interlocking tonguesadjacent the meeting ends of these straps does.n0t

cure the difficulty of uneven clamping orpressure. Moreover, these overlapping'tongus are apt tojdig into the surface of the hose.

It is the object of my invention t0 clamp the hose Wlth a substantially uniform pres-.

sure at all points, thereby avoiding pinching upthe hose at any one point, as heretof0re,

With this end in view I provide one or more wedge members, preferably held on. the internal thimble, said wedge members receiving the meeting ends of the clamping members, whieh are bolted or otherwise tightened about the hose.

As the clamping members or clamps are drawn together they crowd the wedge members inwardly, thereby pressing in on the hose at those places which would otherwise bulge or pinch up, or would at least not be pressed in in the same direction or to the same extent as the remaining circumfe1ence of the hose.

My invention also provides a joint of superior rigidity not liable to injure the hose or pull ont therefrom.

Further advantages and details of improvement will appear in the course of the following description of my invention, the latter being more particularly defined in the appended claims.

.7 In the drawings illustrative of one embodiment of my invention, Figure 1 is a side clevationof my improved fitting'applied to a piece ,of hose and having a female coupling mounted thereon. Fig. 2 is a Vertical crosssection thereof on line 2 2, Fig. l. Fig. 3 is a similar section taken on dotted line 3 3, Figs. 1 and 4. Fig. 4 is a longitudinal section taken in line 4 4:, Fig. 3.

The interior thimble a, having, if desired, a corrugated or threaded enter surface a,may be and is of any usual kind, being shown as fiaring at its inner end to offer less obstruction to the fiow of steamor water therethrough, and slightly tapered e2teriorly to enable it to be fitted readily and tightly into any hose I) of proper size. AdjaCenb its outer end the thimble a is shown as' hairing one or more lugs a twoopposite lugsbeing shown 'With cut-away sections betwecn them to cooperate, as a sort of.bayonet-joint,'with similar lngs a on a ollar c. In theembodiment of my inventionherein shown the wcdge members c showri astWo in number and in.the,form of prongs or legs, are

carried by the collar e, said wedg members 'orlegs xtending clown bvrthe thimble and hose and wedge-shaped in cross-section, being shown in Fig. 3 as tapering off on each side and having lips or stops c at:th'eir ends, this being my preferred construction. 5

Clamps d, two being shoWn, .preferably in the form of heavy fiat bahds, extei1d partially around the hose, just overlapping the edges of the wedge members or legs 0 These clamps are made concentric to the hose for most of their inner surface, being extended therefrom tangentially at cl to overlie the wedge-surfaces of the legs 0 and are provided at their endswith suitable clamping means, as bolts 6. The legs are shown as concaved on their inner faces to fit snugly on the hose.

The ends of the clamp are preferably thickened at 61 to strengthen them against being sprung over toward each other by the tightening of the bolts and nuts, and preferablya V-shaped gap is left, as shown, between the clamps, so as to afiord access to the legs and bolts for convenience. y

The bolts are shown as squared adjacent their heads t0 fit squared aperturcs 61 in th ends of the clamps.

A nut f is shown as mounted to turn on an end flange a", the latter forming a seat for a usual packing-ring and gland for making a coupling or other desired joint.

In nsethe legs or prongs c will be loosely slid onto the hose. The thimble a Will thon be inserted, as shown, within the hose, and the collar c given a quarter-turn to carry its lugs c behind the shoulders a to look the thimble and collar together. The clamps Will then be adjusted about the hose, rcsting on the edges of the Wedge members or legs adjacent the stops 0 and the nuts Will be tightened. As the clamps are brought together the ends thereof Will croWd together over the inclined surfaces of the legs c forcin g the latter inwardlythe same as the clamps are foroed inwardly. The result is that not only is the hose prevented from bulging up between the clamps, but the hose is compressed evenly With a uniform grip at every point, rendering it absolutely steam-tight. lWloreover, the broad, fiat, and even grip of the clamps and legs on the outside of the hose and the corresponding internal grip of the thimble, the thimble and legs being locked together by the lugs a c, render il: impossible to pull the hose out of its clamp or to disrupt the joint. The enlarged ends or hooks 0 on the legs 0 prevent the latter pulling out from beneath the clamps, the latter being more or less embedded in the material of the hose, all the parts being thus firmly locked together and to the hose. I do not restrct my invention to the specific details herein presented, inasmuch as many changes in form, proportion, and combinatin cf parts may be resor'ted to.without departing from the spirit and scope thereof. Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device of the kind described, the combinaton With a clamp having portions adapted to be-brought together about the hose to be clamped, of one or more wedge-shaped members adapted to be acted upon by and during' the said clamping operation t0 coperate With the clamp in compressin g the hose, substantially as described.

2. Ahose-fitting, comprisingan in ner member t0 fit within the hose, a clamp t0 embr.ce the hose between it and said inner member, an outer leg member, locked to said nner member at its outer end beyond the hose, and extending against the hose beneath and between the ends of said clamp, and provided With means to maintain it in its said position and prevent it from moving longitudinally of the clamp or the clamp transversely of it, substantially as described.

3. A hose fitting, comprsing inner and outer coperating parts, said parts being 65 adapted to receive the hose between them and being interlocked at their outer ends beyond the hose, said outer part being formed in one piece including a collar to fit around the inner member and a plurality of legs extending from said collar lengthwise of the hose, and an independent clamp overlapping said legs, substantially as described.

'4. A hose-fitting, comprising a thimble, a wedge member and a clamp,'said Wedge member being wedge-shaped in cross-section and adapted thereby t0 impart a radial pressure to the hose by the tightcning of the Clamp, substantially as described.

5. A clamp for hose comprising a pluraflity of members, and-including a wedge-shtped member adapted to lie longitudinally of the hose and tapering off on each side, and clamp ng means overlapping said tapering sides, clamping movement of said means acting against said we dgeshaped member to press it radially inward, substantially as described.

6. A hose fitting, comprising inner and outer coperating parts, said parts being adapted to receive the hose between them, and being provided at their outer ends beyond the hose with an interlocking bayonejoint, said outer part having one or more legs extending lengthwise of the hose, and

an independent clamp overlapping said legs t0 clamp the legs against the hose and thereby clamp the hose immovably between said cooperating inner and outer parts, substan tially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witncsses.

JOHN 0. DE WVOLF.

Witnesses:

J. W. REEMS, R. B. PRICE. 

